Things You'll Need
Instructions
Open the voice disguise program of your choice by double-clicking its desktop icon or opening it from the start menu.
Activate the voice changer aspect of the program. Each program has a specified way of performing this, outlined in the documentation that comes with the software. Typically, you will have to choose the sound effect you want and the microphone that is currently connected to your computer.
Minimize the voice changing software window but do not quit out of it. Closing it will cause the program to not disguise your voice.
Start "Team Fortress 2" and join any multi-player match. When you communicate via a headset, the voice disguise program will automatically transfer all sounds from your microphone to the designated auto-tuned sound effect.